//
// stmalloc.h
//
// Stacked memory allocation
//
// Copyright (C) 2011 Michael Ringgaard. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright 
//    notice, this list of conditions and the following disclaimer.  
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.  
// 3. Neither the name of the project nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
// SUCH DAMAGE.
// 

#ifndef STMALLOC_H
#define STMALLOC_H

#define STKBLKMIN (4096 - 8 - 8)

struct stkblk {
  struct stkblk *prev;
  char space[STKBLKMIN];
};

struct stkmark {
  struct stkblk *blk;
  char *ptr;
  char *txt;
  char *end;
  struct stkmark *prev;
};

void pushstkmark(struct stkmark *oldmark, struct stkmark *newmark);
void popstkmark(struct stkmark *mark);

void *stalloc(struct stkmark *mark, int size);
int stputbuf(struct stkmark *mark, char *data, int len);
int stputc(struct stkmark *mark, int ch);
int stputstr(struct stkmark *mark, char *str);
char *ststrdup(struct stkmark *mark, char *str);
char *ststr(struct stkmark *mark);
char *ststrptr(struct stkmark *mark);
int ststrlen(struct stkmark *mark);
int stfreestr(struct stkmark *mark, char *str);

#endif
